<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<picture>
			  <source media="(min-width: 800px)" srcset="img/1.webp">
			  <source media="(min-width: 600px)" srcset="img/2.webp">
			  <img src="img/3.webp" alt="示例图片">
			  <embed src="media/m1.wma" type="">
			  <object data="media/m1.wma"></object>
			  <video src="media/song.ogg" controls autoplay muted"></video>
			  
		</picture>
	</body>
</html>